I've been using this for just under 2 years now. It has evened out my skin tone but more importantly, it has reduced my breakouts and my pore size. I have oily, combo skin with large pores. I started using this after a lot of research. According to the data out there, it has the ability to minimise breakouts as much as using Clindomycin, an antibiotic used for acne. (see Dr. Dray on YouTube) On the practical side, I apply it after my toner has dried and allow it to dry for a few minutes before moisturising. Yes, it is tacky for a while but it never balls up under makeup. It often makes your skin tingle for a bit but this seems to be very temporary and subsides quickly. I have seen better levels of hydration in my skin and in the summer I only used this and sunscreen. And for all those retinol users out there (I use Retin-A twice a week) and according to dermatologists, using niacinamide under retinol achieves better results. Again, do your own research but this has become my 'can't live without' product.

I know the instructions say to use this in the morning, but I find it way too sticky. I have not tried putting makeup on top but I can imagine it balling up if I tried. I will be using this only in the evenings when I am taking a break from Retinols.